DC Power Module DC buck buck converter board LM317
The latest listing of LM317 adjustable DC power supply board ， more than 3296 laps precision voltage regulator ， AC / DC can be input ， input voltage range : DC3-40V / AC2.5-27V， with load protection ， which can be accessed below 2.2A load when the input maximum 40V， DC 1.25V-37V continuously adjustable ， wide range of applications (LM317 itself to consume part of the voltage so the maximum output voltage = DC input voltage -3V minimum output voltage of about 1.25V).
The board core components: adjustable voltage regulator dedicated chip LM317， can take less than 2.2A load， AC or DC voltage input ， the maximum input voltage : DC 40V / AC 27V; when you enter a maximum 40V， output voltage range : DC 1.25V-37V continuously adjustable ; increase the load circuit protection circuit load protection. Is a rare wide range of uses DC power board.
adjustable power supply using LM317T production， often due to poor contact potentiometer output voltage increases and burned load. If you increase a transistor ， under normal circumstances ， the transistor \'s base potential is 0 ， the transistor is turned off， no effect on the circuit ; And when the potentiometer is bad， the base potential of the transistor rises ， when raised to 0.7v， the transistor conduction， the adjustment of the terminal voltage is reduced LM317T ， the output voltage is reduced ， and thus the load protection.
Reading is due to the internal linear regulator LM317 ， so power consumption is relatively large. When the input voltage difference is relatively large and the output current is relatively large， the note 317 is not too large power consumption . General power plus heat sink after no more than 20W. Therefore recommended that large tranches pressure regulator .
LM117 / LM317 features:
· Adjustable output voltage : 1.25V to 37V continuously adjustable.
· Ensure 2.2A output current.
· Typical linear adjustment rate: 0.01% .
· A typical load regulation : O.1%.
· Ripple Rejection Ratio : 80dB.
· Output short circuit protection.
· Overcurrent， overtemperature protection.
· Adjustment tube safe operating area protection.
· Standard three-terminal transistor package .
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- Unit Type:
- piece
- Package Weight:
- 0.150kg (0.33lb.)
- Package Size:
- 10cm x 10cm x 10cm (3.94in x 3.94in x 3.94in)